JPH0350820Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention particularly relates to an air pump type water heater that discharges hot water by sending compressed air from the top of the container.

Conventional technology The conventional heater mounting structure for this type of water heater can be roughly divided into a fixed structure in which a band-shaped heater is wound around the outer circumference of the container, and a so-called submersible heater structure in which the heater is installed inside the container. has poor thermal efficiency, and it is extremely difficult to provide such a band-shaped heater in a container with a thermos flask structure.

Problems that the invention aims to solve In contrast to the former structure, the latter has fewer drawbacks, but because the heater unit is placed inside the container, it is difficult to assemble, disassemble, and operate, especially for containers with a thermos structure. Since the diameter of the container opening is minimized to reduce heat loss, special assembly jigs and tools are required, and it is practically difficult to install these jigs and tools in the service department.

Means for Solving the Problems The present invention has been made to eliminate the above-mentioned drawbacks, and it provides a fitting part at the lower end of the water pipe that passes through the heater unit, and makes this fitting part compatible with the heater assembly jig. It has a structure that allows for

Operation With the above configuration, the heater unit can be screwed and fixed to the container by inserting a screwdriver or a heater assembly jig into the fitting part formed by the notch of the water pipe and rotating it.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The containers 19 are numbered 1 to 4 as shown below, and 1 is an inner bottle having a water supply hole 1a at its upper end. 2 is the outer bottle,
A pipe 3 connects the lower ends of the inner and outer bottles 1 and 2, and because of its cylindrical shape, an opening 3a is inevitably formed, and a female thread 3b is formed on the inner wall.
Reference numeral 4 denotes a vacuum space which is a space closed by the connection of the inner bottle 1, outer bottle 2, and pipe 3 and is vacuum-treated.
5 is a heater plate formed from a heat-resistant and corrosion-resistant material such as a stainless steel plate, and the lower end opening has a male screw 5a.
has been established. Reference numeral 6 denotes a water-resistant heater such as a sheathed heater, which is fixed directly below the heater plate 5 so that the terminal portion of the heater 6 protrudes above the heater plate 5. 7 is a heater cover, 8 is a pipe-shaped water tube, and a fitting part 8 consisting of a notch is provided at the lower end.
A is provided. The water tube 8 hangs down through an opening formed at the lower end of the heater plate 5 by connecting the heater plate 5, heater cover 7, and water tube 8 in a watertight manner as shown in the figure. A space 9 is provided. Reference numeral 10 denotes a control component such as a thermostat, which is provided in the space 9 similarly to the terminal portion of the heater 6. A lead wire 11 connects the heater 6, control component 10, etc. to an external power source and is led out of the container 19 from the lower end of the opening 3a. The heater unit 12 is constructed by the parts numbered 5 to 11 above.
It is fixed to the inner bottle 1 by screw fastening of the female thread 3b and the male thread 5a. 13 is a watertight gasket interposed between the heater unit 12 and the inner bottle 1; 14 is a joint pipe that connects the lower end of the water pipe 8; 15 is a gauge pipe that serves both as a discharge and a water volume display; Connected. Reference numeral 16 denotes a discharge port, which is connected to the gauge pipe 15. 17 is a main body, 18 is a lid fixed to the main body 17 so as to be openable and closable, and an air pump 18a for pumping air is provided inside.

The operation of this embodiment having the above configuration will be explained. Water is poured into the water supply hole 1a and heated by the heater 6 via the lead wire 11.The control part 10 senses the water temperature and air temperature and controls the energization to boil the water and control the heat retention.At this time, the water level in the gauge pipe 15 is Due to the principle of a U-shaped tube, the water level is at the same position as the inside of the inner bottle 1, and the water level can be checked from the outside. Next, when the air pump 18a is operated, compressed air is forced into the inner bottle 1, and as a result, the hot water inside passes through the water pipe 8, joint pipe 14, gauge pipe 15, and the discharge port 16.
More desired hot water is discharged. The above installation work of the heater unit 12 involves inserting the heater unit 12 through the water supply hole 1a, connecting the water pipe 8 and the lead wire 11.
is passed through the opening 3a of the pipe 3, and by inserting a screwdriver or an assembly jig into the fitting part 8a, which is a notch at the lower end of the water pipe 8, and rotating it, the female thread 3b and the male thread 5a can be tightened and fixed. Then, the joint pipe 14 is inserted into the water pipe 8 and the connection is completed. Removal of the heater unit 12 is performed in the reverse order.

Effects of the invention As described above, according to the invention, by providing a fitting part at the lower end of the water pipe that passes through the heater unit, it is no longer necessary to use special jigs and tools or provide separate parts for tightening as in the past. The structure is simple, without requiring a particularly strong structure for the container or heater unit, and without touching the outer bottle.
This has the effect of improving workability, improving thermal efficiency during boiling water and keeping warm water, and making it easier to attach and detach the heater unit during service.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a water heater showing an embodiment of the present invention, and FIG. 2 is a detailed sectional view of section A in FIG. 1 of the same water heater. 3a...opening, 8...water pipe, 8a...fitting part, 12...heater unit, 19...container.

Claims (1)

[Scope of utility model registration request] In a water heater consisting of a container containing a liquid and a heater unit provided below the container to heat the liquid in the container, the container 19 has a lower end opening 3.
A female thread 3b is provided near a, a thread 5a is provided below the heater unit 12, and the lower end of a water tube 8 is provided by penetrating the center of the heater unit 12 and hanging down through the center of the male thread 5a. A fitting part 8a is formed to facilitate fitting with a jig for fixing the heater unit, and the heater unit 12 is inserted through the opening at the upper end of the container 19, and the heater unit 12 is inserted into the female thread 3b at the lower end of the container 19.
Fit the male screw 5a of the heater unit 12.
is fixed to the container 19 with screws.